Natalie Portman's baby belly at the 'No Strings Attached' premiere

Since happily announcing her pregnancy and engagement to dancer and choreographer
Benjamin Millepied, "Black Swan's" Natalie Portman has barely had a moment to go home and put her feet up!

Instead, she's gone from "Black Swan" promotion (and a little bit of Oscar campaigning) directly to launching her next movie, which is about as far as you can get from Swan Lake
.

At the "No Strings Attached" premiere on Tuesday night in Westwood, Portman stuck with the theme of her last few public appearances in a figure-skimming dress that didn't exactly show off her growing baby bump, but certainly didn't hide it either.

Portman, who lost a startling amount of weight for her role in "Black Swan," is back to looking healthy and happy. She's an absolutely glowing mother-to-be.

And we would be too, if we were lugging around the rock she's got on her finger! The $750,000 ring makes a statement all by itself.